<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>地理位置测试</title>
    <script type="text/javascript" src="http://api.map.baidu.com/api?v=1.3"></script>
    <script type="text/javascript" src="http://developer.baidu.com/map/jsdemo/demo/convertor.js"></script>
    <script type="text/javascript">
        var map;
        var gpsPoint;
        var baiduPoint;
        var gpsAddress;
        var baiduAddress;

        function getLocation() {
            //根据IP获取城市  
            var myCity = new BMap.LocalCity();
            myCity.get(getCityByIP);

            //获取GPS坐标  
            if (navigator.geolocation) {
                navigator.geolocation.getCurrentPosition(showMap, handleError, { enableHighAccuracy: true, maximumAge: 1000 });
            } else {
                alert("您的浏览器不支持使用HTML 5来获取地理位置服务");
            }
        }

        function showMap(value) {
            var longitude = value.coords.longitude;
            var latitude = value.coords.latitude;
            map = new BMap.Map("map");
            alert("坐标经度为：" + latitude + "， 纬度为：" + longitude );
            var ele=window.document .getElementById ("zuoB");
            ele.innerHTML = "坐标经度为：" + latitude + "， 纬度为：" + longitude;
            gpsPoint = new BMap.Point(longitude, latitude);    // 创建点坐标  
            map.centerAndZoom(gpsPoint, 15);

            //根据坐标逆解析地址  
            var geoc = new BMap.Geocoder();
            geoc.getLocation(gpsPoint, getCityByCoordinate);

            BMap.Convertor.translate(gpsPoint, 0, translateCallback);
        }

        translateCallback = function (point) {
            baiduPoint = point;
            var geoc = new BMap.Geocoder();
            geoc.getLocation(baiduPoint, getCityByBaiduCoordinate);
        }

        function getCityByCoordinate(rs) {
            gpsAddress = rs.addressComponents;
            var address = "GPS标注：" + gpsAddress.province + "," + gpsAddress.city + "," + gpsAddress.district + "," + gpsAddress.street + "," + gpsAddress.streetNumber;
            var marker = new BMap.Marker(gpsPoint);  // 创建标注
            map.addOverlay(marker);              // 将标注添加到地图中
            var labelgps = new BMap.Label(address, { offset: new BMap.Size(20, -10) });
            marker.setLabel(labelgps); //添加GPS标注
        }

        function getCityByBaiduCoordinate(rs) {
            baiduAddress = rs.addressComponents;
            var address = "百度标注：" + baiduAddress.province + "," + baiduAddress.city + "," + baiduAddress.district + "," + baiduAddress.street + "," + baiduAddress.streetNumber;
            var marker = new BMap.Marker(baiduPoint);  // 创建标注
            map.addOverlay(marker);              // 将标注添加到地图中
            var labelbaidu = new BMap.Label(address, { offset: new BMap.Size(20, -10) });
            marker.setLabel(labelbaidu); //添加百度标注
        }

        //根据IP获取城市
        function getCityByIP(rs) {
            var cityName = rs.name;
            alert("根据IP定位您所在的城市为:" + cityName);
        }

        function handleError(value) {
            switch (value.code) {
                case 1:
                    alert("位置服务被拒绝");
                    break;
                case 2:
                    alert("暂时获取不到位置信息");
                    break;
                case 3:
                    alert("获取信息超时");
                    break;
                case 4:
                    alert("未知错误");
                    break;
            }
        }

        function init() {
            getLocation();
        }

        window.onload = init;

    </script>
</head>
<body>
<div  id="map" style="width:600px;height:600px;display: none"></div>
<span id="zuoB"></span>
</body>
</html>  